WATER

Summary from the TLDR newsletter

A team of engineers from MIT and China have designed a solar desalination system that passively turns seawater into drinking water. It circulates water in swirling eddies, which when combined with the sun's heat drives water to evaporate and leave salt behind. The resulting water vapor can be condensed and collected while the leftover salt circulates out of the device rather than accumulating and clogging the system. A small suitcase-sized system could produce up to 6 liters of drinking water per hour and last several years.